name: flame-harness-build description: Phase 8 — bootstrap signing credentials, generate fastlane config from templates, and build + upload signed IPA (TestFlight) and AAB (internal track). argument-hint: "" allowed-tools: [Read, Write, Edit, Bash, Glob] metadata: version: "1.0.0"

flame-harness-build

Phase 8 of the flutter-flame-harness pipeline. Bootstraps signing credentials into the generated game, generates fastlane config from the Task 3 templates, then builds and uploads a signed IPA to TestFlight and a signed AAB to the Play Store internal track.

All file schemas (config.md, state.md, pipeline-log.md) and the phase transition table are defined in docs/harness-protocol.md — that document is the single source of truth (§1 for config.md including credentials_dir, ios, and android blocks; §2 for state.md; §6 for log schemas; §7 for the build → screenshot transition and the status: running rule). Do not redefine schemas here.

Prerequisites: An App Store Connect app record and a Google Play Console app must already exist (created once manually). The upload lanes will fail without them. Fastlane and Ruby must be installed on the developer's macOS machine (Xcode and the flutter CLI are assumed present).

Input — Read Inputs

Before any action, load:

1. docs/harness/config.md — extract app_slug, bundle_id, app_name, and credentials_dir

(per protocol §1). Also read ios.asc_key_id and android.key_alias.

1. docs/harness/state.md — confirm next_role: build (per protocol §2).

Derive the game root path: <projects-dir>/<app_slug>/.

Phase 1 — Credential Bootstrap

Copy signing credentials from the shared credentials_dir (per protocol §1 — skills must not hard-code credential paths; always read credentials_dir from config.md) into the game's platform directories.

iOS credentials

mkdir -p <game>/ios/fastlane/certs
cp <credentials_dir>/AuthKey_<asc-key-id>.p8 <game>/ios/fastlane/

The .p8 filename encodes the ASC key ID from config.md ios.asc_key_id. The certs/ directory holds the downloaded distribution certificate and provisioning profile (written by fastlane certs).

Android credentials

mkdir -p <game>/android/fastlane
cp <credentials_dir>/play-store-key.json <game>/android/fastlane/

Android keystore

Check whether <credentials_dir>/upload-keystore.jks exists.

• If it exists: copy it.

``bash cp <credentials_dir>/upload-keystore.jks <game>/android/upload-keystore.jks ``

• If it is missing: generate a new keystore with keytool. Use the alias and password

defined in config.md android.key_alias (default: upload). Store and key passwords are both <keystore-password>.

``bash keytool -genkey -v \ -keystore <game>/android/upload-keystore.jks \ -alias upload \ -keyalg RSA -keysize 2048 -validity 10000 \ -storepass <keystore-password> -keypass <keystore-password> \ -dname "CN=<company>, OU=Dev, O=<company>, L=Seoul, S=Seoul, C=KR" ``

android/key.properties

Write <game>/android/key.properties by substituting the templates/key.properties.template values (placeholders are already concrete — the template uses literal values matching the keystore generated above):

storePassword=<keystore-password>
keyPassword=<keystore-password>
keyAlias=upload
storeFile=upload-keystore.jks

The storeFile path is relative to the android/ directory, which is where Gradle reads it.

Phase 2 — Fastlane Config Generation

Generate fastlane Appfile and Fastfile for both platforms by substituting the following placeholders in the templates located at templates/fastlane/:

Note: __PROFILE_NAME__ is used both as the Xcode code-signing profile name and as the .mobileprovision filename (with .mobileprovision appended by fastlane). Spaces are acceptable.

iOS fastlane

mkdir -p <game>/ios/fastlane/certs
# Write Appfile
sed -e 's/__APP_ID__/<bundle_id>/g' \
    templates/fastlane/ios-Appfile.template \
    > <game>/ios/fastlane/Appfile
# Write Fastfile
sed -e 's/__APP_ID__/<bundle_id>/g' \
    -e 's/__IPA_NAME__/<app_name>.ipa/g' \
    -e 's/__PROFILE_NAME__/<bundle_id> AppStore/g' \
    templates/fastlane/ios-Fastfile.template \
    > <game>/ios/fastlane/Fastfile

Android fastlane

mkdir -p <game>/android/fastlane
# Write Appfile
sed -e 's/__PACKAGE__/<bundle_id>/g' \
    templates/fastlane/android-Appfile.template \
    > <game>/android/fastlane/Appfile
# Write Fastfile
sed -e 's/__PACKAGE__/<bundle_id>/g' \
    templates/fastlane/android-Fastfile.template \
    > <game>/android/fastlane/Fastfile

After substitution, verify with grep '__' <game>/ios/fastlane/Appfile <game>/ios/fastlane/Fastfile <game>/android/fastlane/Appfile <game>/android/fastlane/Fastfile — output must be empty (no unresolved placeholders).

Phase 3 — Build and Upload

Run all build commands from the game root (<projects-dir>/<app_slug>/).

Pre-build platform requirements

Before building, ensure the platform items in docs/game-gotchas.md (Build/platform + Store rejections) are in place — these are submit-blockers if missing: iOS PrivacyInfo.xcprivacy registered (iOS 17+), Android minSdk = 23 + core-library desugaring, iOS Podfile platform bumped, Info.plist ATT + SKAdNetworkItems, and ITSAppUsesNonExemptEncryption = false (skip the export-compliance prompt). Bump the build number on every upload — App Store Connect rejects a duplicate build number, so increment it (don't reuse 1).

Re-run / resume safety (store uploads are NOT idempotent): if this phase is re-entered after a partial or failed upload, bump the build number again before re-uploading — re-sending the same build number fails on ASC and can create a stuck/duplicate build on Play. Verify in App Store Connect / Play Console whether the prior build actually landed before retrying; never blindly re-run the upload lane with the same number.

iOS — Signed IPA → TestFlight

cd <game>/ios
fastlane certs          # downloads/renews distribution cert + provisioning profile into certs/
fastlane beta           # builds the signed IPA and uploads it to TestFlight

fastlane beta calls get_provisioning_profile, update_code_signing_settings, build_app, and upload_to_testflight (defined in the generated Fastfile). The lane sets skip_waiting_for_build_processing: true so it does not block waiting for Apple's processing.

Android — Signed AAB → internal track

cd <game>
flutter build appbundle --release   # produces build/app/outputs/bundle/release/app-release.aab
 
cd android
fastlane internal                   # uploads AAB to the Play Store internal track

fastlane internal calls upload_to_play_store with track: "internal" and the relative AAB path ../build/app/outputs/bundle/release/app-release.aab (defined in the generated Fastfile).

Build failure handling

• If fastlane certs fails with a certificate error, check that the Apple Distribution

certificate is valid in Keychain Access, then re-run.

• If fastlane beta fails with a profile not found error, ensure the app record exists in App

Store Connect (prerequisite above) and re-run fastlane certs first.

• If flutter build appbundle --release fails, run flutter analyze to identify compilation

errors and fix them before retrying.

• If fastlane internal fails with a 401 or credential error, verify that

android/fastlane/play-store-key.json was copied correctly and that the service account has the Release Manager role in Play Console.

Output — Write Handoff and State

handoff/build-result.md

Write docs/harness/handoff/build-result.md with the following layout:

# Build Result — <app_name>
 
## IPA
 
-Path: `<game>/ios/build/<app_name>.ipa`
-Upload: TestFlight — uploaded successfully (build number: <N>)
 
## AAB
 
-Path: `<game>/build/app/outputs/bundle/release/app-release.aab`
-Upload: Play Store internal track — uploaded successfully (version code: <N>)
 
## Build Number
 
-iOS build number: <N>
-Android version code: <N>

Fill <N> with the actual build number / version code reported by fastlane output.

state.md

Write docs/harness/state.md atomically (per protocol §7 build → screenshot transition and §7 rule 2 — set status: running in the same write as next_role):

status: running
current_phase: build
next_role: screenshot
updated_at: "<ISO-8601 UTC now>"

Leave current_round, created_at, resume_attempts, and pause_reason unchanged.

pipeline-log.md

Append one row to docs/harness/pipeline-log.md (per protocol §6):

| <ISO-8601 UTC now> | complete | build | IPA uploaded to TestFlight; AAB uploaded to internal track; next: screenshot |

Error Handling and Pausing

If either upload fails and cannot be resolved immediately, write docs/harness/state.md with:

status: paused
current_phase: build
next_role: build
pause_reason: manual_action
updated_at: "<ISO-8601 UTC now>"

Then explain what manual action is required. The harness will resume when the user runs flame-harness-resume (per protocol §7 pause/resume rules).